Step 2, demand compliance.
Step 3, upon not hearing of compliance, levy fines.
Step 4, upon non payment of fines, declare in breach of (2).
Step 5, block site from UK using DNS, in the same manner as torrent sites etc.
5 was always the goal, 2 to 4 are largely just performative.
The UK government has lost control of what happen in the physical world on their own island so now the bureaucrats play a fantasy game where they are gonna enforce their rules and dominion in their former colonies or the digital world.
Politics has become its own end: politicians have job security, and nothing changes except for the worse because constituents keep falling for the same tired shit.